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12 February 1992
DEVELOPMENT
[Black]
6.4 CROSS MIXING
[E]
[F]
[A]
[B]
[C]
[E]
[D]
[Color]
[A]
[F]
[D]
[C]
[B]
This copier uses a standard cross-mixing mechanism to keep the toner and
developer evenly mixed. It also helps agitate the developer to prevent
developer clumps from forming and helps create the triboelectric charge.
The developer on the rotating development roller [A] is split into two parts by
the doctor blade [B]. The part that stays on the development roller forms the
magnetic brush and develops the latent image on the drum. The part that is
trimmed off goes to the backspill plate.
The rest of the developer slides down the backspill plate [C] to the paddle
roller [D]. The mixing vanes [E] move it slightly toward the rear (toward the
front for the color development unit) of the unit. Part of the developer falls into
the auger inlet and is transported to the front of the development unit (rear of
the color unit) by the mixing auger [F].
The agitator moves the developer slightly to the front as it turns, so the
developer stays level in the development unit.
2-49
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